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OpenStudy (anonymous):
a circumference of a circle of radius r is given by the polynomial 2(3.14)r. find circumference of a circle with a radius 9 cm
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OpenStudy (mathstudent55):
C = 2(3.14)r Let r = 9 cm, and solve for C
OpenStudy (anonymous):
would it =56.52 or did i do it wrong im confused
OpenStudy (mathstudent55):
C = 2(3.14)(9 cm) = 6.28(9 cm) = 56.52 cm. You are correct.
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